EP3610708B1 - Elektronisches modul mit verbessertem schutz gegen feuchtigkeit - Google Patents

Elektronisches modul mit verbessertem schutz gegen feuchtigkeit Download PDF

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Publication number
EP3610708B1
EP3610708B1 EP18714811.9A EP18714811A EP3610708B1 EP 3610708 B1 EP3610708 B1 EP 3610708B1 EP 18714811 A EP18714811 A EP 18714811A EP 3610708 B1 EP3610708 B1 EP 3610708B1
Authority
EP
European Patent Office
Prior art keywords
electronic module
internal volume
temperature
electronic
zone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18714811.9A
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English (en)
French (fr)
Other versions
EP3610708A1 (de
Inventor
François Guillot
Jean-Marc BLINEAU
Philippe Avignon
Serge Roques
Franck ALBERO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Electronics and Defense SAS
Safran Electrical and Power SAS
Original Assignee
Safran Electronics and Defense SAS
Safran Electrical and Power SAS
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Publication of EP3610708A1 publication Critical patent/EP3610708A1/de
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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/0212—Condensation eliminators
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B15/00—Systems controlled by a computer
    • G05B15/02—Systems controlled by a computer electric
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10151—Sensor
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/0026—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units

Definitions

  • the present invention relates to the field of electronics and more particularly to modules comprising an electronic card.
  • Electronic modules comprising an electronic data processing card, means for connecting a data line to allow an exchange of data and instructions with the electronic card, and means for connecting a power line. to supply the electronic card with energy.
  • Electronic components and more generally the electrical conductors present on electronic cards must be protected from dust, humidity and chemical or mechanical attacks of all kinds. Moisture in liquid form is in particular responsible for electronic board malfunctions resulting from the creation of short circuits or oxidation of electronic components or conductors of the electronic board.
  • An object of the invention is to improve the protection of electronic modules against humidity.
  • an electronic module comprising a protective envelope delimiting an internal volume and an electronic card arranged in the internal volume.
  • the electronic module comprises means for detecting a predetermined environmental condition of the internal volume and means for generating a cold zone inside the internal volume, arranged so that the cold zone is separated from the electronic card.
  • a control unit is connected to the means for detecting an environmental condition and to the means for generating a cold zone.
  • the control unit is arranged to trigger the means for generating a cold zone when the means for detecting a predetermined environmental condition of the internal volume detect an environmental condition liable to cause condensation of the humidity of the air contained in the internal volume on the electronic board.
  • control unit can, when it detects environmental conditions liable to cause condensation of the humidity of the air contained in the internal volume, control the means for generating a cold zone. This forces the condensation of humidity on the cold zone rather than on the electronic board.
  • the cold zone being separated from the electronic card, it is ensured that condensation does not take place on the electronic card.
  • the protective casing protects the electronic card from dust, external humidity, smoke and chemical or mechanical attacks of all kinds, making it unnecessary to protect the electronic card by varnish.
  • a cold zone is a localized volume or surface the temperature of which is lower than that of a reference zone.
  • a cold zone can be obtained by raising the temperature of the reference zone, which creates a temperature gradient and therefore the appearance of a zone of higher temperature and of a zone of lower temperature.
  • a cold zone can also be obtained by reducing the temperature of said cold zone.
  • the protective envelope is removable.
  • the electronic card can then be simply repaired by extracting it from the protective casing.
  • the means for detecting a predetermined environmental condition comprise a first temperature sensor integral with the electronic card and / or a second temperature sensor integral with the protective casing.
  • Quick and simple detection of the appearance of an environmental condition liable to cause condensation of the humidity of the air contained in the internal volume on the electronic card is obtained when the control unit is arranged to trigger the means. generating a cold zone when a temperature measured by the first temperature sensor is lower than the temperature measured by the second temperature sensor.
  • the module of the invention is particularly robust when the means for generating a cold zone comprise a Peltier effect cell which has a hot face and a cold face.
  • the hot face of the Peltier cell is thermally connected to the protective casing or to a thermally conductive frame of the electronic module.
  • the means for generating a cold zone are arranged so that the condensates resulting from the condensation of the air contained in the internal volume are directed towards a dedicated retention zone of the internal volume and / or towards the outside of the volume. internal.
  • the retention zone is coated with a protective resin.
  • the electronic module according to the invention is here arranged to be mounted in an avionics bay 60 of an aircraft (not shown).
  • the electronic module 100 comprises an electronic card 10 fixed to a base 20 of a protective casing 21.
  • Electronic tracks 11 and 12 respectively connect the electronic card 10 to a first data connector 13 and to a second power supply connector 14. which both open onto an outer surface of the protective casing 21.
  • the protective envelope 21 extends around the electronic card 10 and delimits an internal volume 22 of the electronic module 100.
  • a first temperature sensor 30 and a second temperature sensor 31 - both of the resistive type - are respectively glued to the card 10 and to an internal face 23 of the protective casing 21.
  • a Peltier effect cell 50 comprising a hot surface 51 and a cold surface 52 is connected by bonding its hot surface 51 to an interior surface 24 of the base 20.
  • a retention zone 53 located directly above the Peltier effect cell 50 when the module electronics 10 is plugged into the avionics bay 60 ( figure 2 ) is covered with parylene.
  • the retention zone 53 forms a bowl in the center of which an orifice 54 provided with a valve 55 passes through the protective casing 21 and opens outwardly thereof.
  • a processor 40 is connected to the first and second temperature sensors 30 and 31 as well as to the Peltier effect cell 50.
  • the processor 40 is supplied with energy via the power supply connector 14 and exchanges data with the outside via the data connector 13.
  • the processor 40 monitors and compares the temperatures T 30 and T 31 respectively measured by the first and second temperature sensors 30 and 31 to detect conditions liable to cause condensation of the humidity of the air contained in the volume. internal 22 on the electronic card 10.
  • Such a situation may arise when the aircraft 1 is started after having been subjected to a low temperature.
  • the operation of one of the neighboring modules of the module 100 can heat up the protective casing 21 and the air contained in the internal volume 24 before the electronic card 10 has been called upon and has been able to rise in temperature.
  • Electronic card 10 is therefore cooler than air contained in the internal volume 24 and condensation is likely to form on the electronic card 10.
  • the temperature T 30 measured by the first temperature sensor 30 is then lower than the temperature T 31 measured by the second temperature sensor 31 and the processor 40 detects conditions liable to cause condensation of the humidity of the air contained in the internal volume 22 on the electronic card 10.
  • the processor 40 then triggers the operation of the Peltier effect cell 50.
  • the cold surface 52 of the Peltier cell 50 then creates a cold zone whose temperature T 52 is lower than that of the electronic card 10. This lower temperature of the cold face 52 causes condensation on the latter rather than on the electronic card 10, protecting the electronic card 10 for condensation.
  • the condensates formed on the surface of the cold face 52 fall by gravity into the retention zone 53 and are discharged towards the orifice 54.
  • An electronic module 100 is thus obtained, the electronic card 10 of which is protected from dust, external humidity, smoke and mechanical attack by the protective casing 21.
  • the protective casing 21 can be dismantled in order to 'easy access to the electronic card 10 which, not requiring varnish protection, is then easily repairable.
  • the Peltier effect cell 50 makes it possible to protect the electronic card 10 from the humidity contained in the internal volume 22.
  • the processor 40 only triggers the operation of the Peltier effect cell 50 after having previously performed a comparison of the temperature T 30 measured by the first temperature sensor 30 with a threshold temperature T e10 , here equal to twenty degrees centigrade. If the temperature T 30 measured by the first temperature sensor 30 is greater than the threshold temperature T s10 , the processor 40 does not trigger the operation of the Peltier effect cell 50. In the case where the temperature T 30 measured by the first temperature sensor 30 is below the threshold temperature T s10 , the processor 40 triggers the operation of the Peltier effect cell 50 when the temperature T 30 measured by the first temperature sensor 30 is lower than the temperature T 31 measured by the second temperature sensor 31.
  • the electronic card 10 comprises a third temperature sensor 32 and a fourth temperature sensor 33.
  • the third temperature sensor 32 and the fourth temperature sensor 33 are placed on the electronic card 10 in zones determined according to the topology of the electronic card 10 and its thermal dissipation profile to measure the temperatures of the areas of the electronic card 10 which may be at temperatures lower than the rest of the electronic card. These areas can be located near components exhibiting significant thermal inertia such as, for example, the metallic masses of voltage transformers.
  • the detection of the condition liable to cause condensation of the humidity of the air contained in the internal volume 22 on the electronic card 10 then proceeds as follows.
  • the processor 40 compares the temperatures T 30 , T 32 and T 33 respectively measured by the first temperature sensor 30, the third temperature sensor 32 and the fourth temperature sensor 33 and retains the temperature T min (30, 32, 33) the lowest. This lowest temperature T min (30, 32, 33) can then be compared with the threshold temperature T r10 . If the lowest temperature T min (30, 32, 33) is lower than the threshold temperature T s10 , the processor 40 then compares the lowest temperature T min (30, 32, 33) with the temperature T 32 measured by the second temperature sensor 32.
  • the processor 40 If the lowest temperature T min (30, 32, 33) is lower than the temperature T 31 measured by the second temperature sensor 31, the processor 40 detects conditions liable to cause condensation of the humidity in the air contained in the internal volume 22 on the electronic card 10. The processor 40 then triggers the operation of the Peltier effect cell 50.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Claims (10)

  1. Elektronisches Modul (100), umfassend eine Schutzumhüllung (21), die ein Innenvolumen (22) begrenzt, sowie eine Leiterplatte (10), die in dem Innenvolumen (22) angeordnet ist, wobei das elektronische Modul (100) umfasst:
    - Detektionsmittel (30, 31) zum Erfassen einer vorbestimmten Umgebungsbedingung des Innenvolumens (22);
    - Erzeugungsmittel (50) zum Erzeugen einer kalten Zone im Inneren des Innenvolumens (22), die so ausgebildet sind, dass die kalte Zone von der Leiterplatte (10) getrennt ist;
    - eine Steuereinheit (40), die mit den Detektionsmitteln (30, 31) zum Erfassen einer Umgebungsbedingung und mit den Erzeugungsmitteln (50) zum Erzeugen einer kalten Zone verbunden ist, und dadurch gekennzeichnet, dass die Steuereinheit (40) ausgebildet ist, um die Erzeugungsmittel (50) zum Erzeugen einer kalten Zone auszulösen, wenn die Detektionsmittel zum Erfassen einer vorbestimmten Umgebungsbedingung des Innenvolumens (22) eine Umgebungsbedingung erfassen, die eine Kondensation der Feuchtigkeit der in dem Innenvolumen (22) enthaltenen Luft auf die Leiterplatte (10) verursachen kann.
  2. Elektronisches Modul (100) nach Anspruch 1, bei dem die Detektionsmittel zum Erfassen einer vorbestimmten Umgebungsbedingung einen ersten Temperatursensor (30) umfassen, der fest mit der Leiterplatte (10) verbunden ist.
  3. Elektronisches Modul (100) nach einem der vorhergehenden Ansprüche, bei dem die Detektionsmittel zum Erfassen einer vorbestimmten Umgebungsbedingung einen zweiten Temperatursensor (31) umfassen, der fest mit der Schutzumhüllung (21) verbunden ist.
  4. Elektronisches Modul (100) nach den Ansprüchen 2 und 3, bei dem die Steuereinheit (40) so ausgebildet ist, dass sie die Erzeugungsmittel (50) zum Erzeugen einer kalten Zone auslöst, wenn eine von dem ersten Temperatursensor (30) gemessene Temperatur (T30) niedriger als die von dem zweiten Temperatursensor (31) gemessene Temperatur (T31) ist.
  5. Elektronisches Modul (100) nach Anspruch 4, bei dem die Steuereinheit (40) so ausgebildet ist, dass sie die Erzeugungsmittel (50) zum Erzeugen einer kalten Zone nur auslöst, wenn die von dem ersten Temperatursensor (30) gemessene Temperatur (T30) niedriger als eine vorbestimmte Schwellenwerttemperatur (Ts10) ist.
  6. Elektronisches Modul (100) nach Anspruch 2, bei dem die Detektionsmittel zum Erfassen einer vorbestimmten Umgebungsbedingung einen dritten Temperatursensor (32) umfassen, der fest mit der Leiterplatte (10) verbunden ist.
  7. Elektronisches Modul (100) nach einem der vorhergehenden Ansprüche, bei dem die Erzeugungsmittel zum Erzeugen einer kalten Zone eine Zelle (50) mit Peltier-Effekt umfassen, die eine warme Seite (51) und eine kalte Seite (52) hat.
  8. Elektronisches Modul (100) nach Anspruch 7, bei dem die warme Seite (51) der Peltier-Zelle thermisch mit der Schutzumhüllung (21) oder mit einem wärmleitenden Rahmen des elektronischen Moduls (100) verbunden ist.
  9. Elektronisches Modul (100) nach einem der vorhergehenden Ansprüche, bei dem die Erzeugungsmittel zum Erzeugen einer kalten Zone (50) so ausgebildet sind, dass die von der Kondensation der in dem Innenvolumen (22) enthaltenen Luft stammenden Kondensate in Richtung einer dedizierten Rückhaltezone (53) des Innenvolumens (22) und/oder nach außerhalb des Innenvolumens (22) geleitet werden.
  10. Elektronisches Modul (100) nach Anspruch 9, bei dem die Rückhaltezone (53) von einem Schutzharz überzogen ist.
EP18714811.9A 2017-04-12 2018-04-10 Elektronisches modul mit verbessertem schutz gegen feuchtigkeit Active EP3610708B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1753230A FR3065348B1 (fr) 2017-04-12 2017-04-12 Module electronique a protection amelioree contre l’humidite
PCT/EP2018/059146 WO2018189169A1 (fr) 2017-04-12 2018-04-10 Module electronique a protection amelioree contre l'humidite

Publications (2)

Publication Number Publication Date
EP3610708A1 EP3610708A1 (de) 2020-02-19
EP3610708B1 true EP3610708B1 (de) 2021-06-02

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Application Number Title Priority Date Filing Date
EP18714811.9A Active EP3610708B1 (de) 2017-04-12 2018-04-10 Elektronisches modul mit verbessertem schutz gegen feuchtigkeit

Country Status (5)

Country Link
US (1) US11140793B2 (de)
EP (1) EP3610708B1 (de)
CN (1) CN110506456B (de)
FR (1) FR3065348B1 (de)
WO (1) WO2018189169A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12137527B2 (en) 2020-08-18 2024-11-05 Rosemount Aerospace Inc. Method and device for water intrusion mitigation
CN114158180B (zh) * 2021-10-08 2023-09-05 中国安全生产科学研究院 具有散热功能的驱动器及应用驱动器的红外探测器

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WO2003069749A1 (en) * 2002-02-14 2003-08-21 Finisar Corporation Header assembly having integrated cooling device
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Also Published As

Publication number Publication date
WO2018189169A1 (fr) 2018-10-18
EP3610708A1 (de) 2020-02-19
FR3065348A1 (fr) 2018-10-19
FR3065348B1 (fr) 2022-06-24
US20200107459A1 (en) 2020-04-02
US11140793B2 (en) 2021-10-05
CN110506456B (zh) 2020-09-01
CN110506456A (zh) 2019-11-26

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